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Operating Flexibility of Natural Gas Combined Cycle Power Plant Integrated with Post-Combustion Capture

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Document pages: 3 pages

Abstract: This study reports key findings from a rigorous technical assessment of the performance of a natural gas fired power station fully integrated with a post-combustion MEA based capture unit. Behaviour at full load and at part load, during solvent storage operation and during regeneration of previously stored rich solvent, is characterised. Two different part load power cycle and capture unit control strategies are assessed during additional regeneration of stored solvent using alternative steam extraction strategies: (1) floating IP LP crossover pressure; and (2) throttled IP LP crossover. In practise these strategies could be used in combination. In contrast to previous literature the operating limits are described in detail. Additionally, a variable speed integrally geared centrifugal compressor model is deployed to predict the off design performance and operating limits of the compression unit.

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